a rule of thumb

A rule of thumb is a general rule or principle that is based on experience rather than on scientific evidence.

As a rule of thumb, I check the oil levels in my car on the first Saturday in every month.

This means that I try to check the levels of oil in my car once a month and I try to do it on the first Saturday of each month. In practice, I might check the level of oil at different times of the month.

About me

My name is Stephen Taylor and I have been teaching English as a foreign language for over20 years and have helped over 22 different nationalities improve their English language skills. I understand how important a good band score in the IELTS exam is and I know how to help you achieve your target grade.